Side-loaded pressure regulated free-ink ink-jet pen

Details Side-loaded pressure regulated free-ink ink-jet pen Side-loaded pressure regulated free-ink ink-jet pen

1996-03-05

1998-07-07

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

347 87, 347 93, B41J 201

Patent

active

057776474

ABSTRACT:
The present invention relates to free-ink type ink-jet pens. A dual-chambered housing forms ink accumulators which provide a local supply of ink for a printhead mechanism. The accumulators are fluidically coupled to an off-board ink reservoir by a valve mechanism. A pressure regulator mechanism is incorporated into a chamber for maintaining a predetermined gage set point back-pressure within the pen and for regulating the flow of ink from the reservoir by controlling the valve mechanism. A near linear force by biasing the regulator mechanism so as to balance it against a force exerted thereon by the ambient atmosphere via a vent when the valve mechanism is opened due to a force exerted by a differential between ambient atmospheric pressure and the bias force. The mechanism is insensitive to the rate of flow of ink through the valve.

REFERENCES:
patent: 4475116 (1984-10-01), Sicking et al.
patent: 5367328 (1994-11-01), Erickson
patent: 5453772 (1995-09-01), Aono et al.

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